Listen to I. Allegro - 12 online. I. Allegro - 12 is an English language song and is sung by Stefan Schilli, Giovanni Deangeli, Stuttgart Chamber Orchestra and Nicol Matt. I. Allegro - 12, from the album Albinoni: Complete Oboe Concertos, was released in the year 2013. The duration of the song is 3:09. Download English songs online from JioSaavn.